There are many more ideas to drive traffic .
One of the best and long lasting Idea is search engine optimization . Every webmaster should have basic knowledge of search engine optimization .
All visitors from other source depends on your daily work but search engines are main key of success of every successful webmaster .
Here are some search engine optimization tips
There are many other methods like link/banner exchange , article submission , forum signatures , email marketing and many more
Here some best ideas to drive traffic at zero cost